I've stayed at both, liked both, and much preferred Riverside. I've been in both AB and MB, and like AB better, I like the wandering pathways and gardens between buildings. In fact, I always liked the leisurely walk to the food court to refill our mugs. I liked the food court better at Riverside with more choices, lots of corners with bright windows to sit at, and IMHO a better decor. Before the renovations the rooms were getting a bit used feeling, but now they're all brand new and the MB room we had in Nov was great. I also love to see Bob Jackson in the River Roost Lounge, it wouldn't be a trip to Disney without that. I like the main pool at Riverside better, and the fact that they have smaller pools as well. I just never found the serpent slide appealing like most people do! The shop at Riverside is larger with a better selection. However, all of that being said, I like the theme at FQ and thoroughly enjoyed our stay there as well I just decided my preference will always be Riverside.